In 1998 ACM Systems (Acquired Advanced Countermeasure Systems) was acquired by Sierra Nevada Corporation - itself an actively involved SBIR firm - expanding thelatter firms' portfolio to include high-end tactical, ground-based electronic warfare (EW) systems and non-tactical data collection/laser tag systems used in warfighter training and evaluation. ACM specializes in designing, manufacturing and fielding custom hardware and software solutions for the U.S. Department of Defense and prime contractors in support of specific requirements. ACM has two major areas of custom hardware and software development: test and training range instrumentation and electronic warfare.